Cut the chicken into bite-sized pieces and coat with cornstarch.
Chop the vegetables: slice the bell peppers, cut the broccoli, and rinse the snap peas.
Whisk together the soy sauce, honey, rice vinegar, sesame oil, and red pepper flakes in a small bowl.
Heat 1 tablespoon of vegetable oil in a skillet over medium-high heat and cook the chicken until golden brown.
In the same skillet, add the remaining oil and stir-fry the vegetables until tender-crisp, then add garlic and ginger.
Combine the sauce with the vegetables and return the chicken to the skillet, tossing everything together until heated through.